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Question: 6 suppose random variables z are exponentially distributed ziexp2 for...

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6. Suppose random variables Z, are exponentially distributed: ZiExp(2) for i 1,2,..., n. Assume that the random variables Z, are independent. For each of the following functions of the Zi, find the expectation E] and variance Var[ ]. (a) 3 Z1- (b) 1.5Z1 +222-3 (c) i 32 (simplify, but final answer is an expression)
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